The X2 is a pretty good pack for whitetail deer hunting and packing your saddle gear. Plenty of room in the main compartment. Climbing sticks stack nicely on the outside of the pack using the side compression panels and buckles. Most platforms (including the Mission) can fit in the middle section and lash nicely together using the bottom compression panel.
Eberlestock packs have a pretty good reputation. Well built. Quality. Comfortable (for some, more on that below).
There are generally two areas where people see improvements needed for this pack.
The first is an easy fix, and that is to completely remove the frame and wrap it in hockey tape or vet wrap to eliminate any squeaking of the frame. The squeaky frame has happened on some (but not all) X2 packs. (You can look this up online) Again, an easy remedy.
The second thing you will hear about the X2 is a lack of functional load lifters. This is somewhat of a function of fit for the user and use. Depending on your torso length and how much weight you are carrying, this could be an issue. As a general statement, if the X2 fits your torso well or you are not hauling a great deal of weight for extended distances, the pack will work great. If, however, it does not fit your torso well, and you are packing a heavy load for any distance, the lack of functional load lifters will become a real issue. (Elk hunting in the mountains, packing meat, etc.). Again, not a “problem” that everyone will experience, but some certainly have!
For most whitetail hunts, carrying in saddle hunting gear, this pack will work really well!